i just did that yesterday, super clean, all you need to do is place the folder labelled 'MMMHD' into the 'data' folder in "mugen 1.1b". then you should see a 'mugen.cfg' file in that same 'data' folder, open that with notepad and edit line of text that says "motif = data/mugen1/system.def" with motif = data/MMMHD/system.def